I have an HP Pavilion dv6000 laptop with Windows Vista and 1GB RAM. When it powers up it shows a black screen that never does anything but stay black. About every 10-12 seconds I hear 2 beeps, then the computer refreshes with the blue LED lights across the top of the keyboard. This process repeats itself until I turn off the laptop. The computer was working fine, then I left for a week and when I came back, this is what I found. The laptop has not been used while I was away. I have no idea what to do. I appreciate any assistance provided.